User's Manual

MDS 05-3447A01, Rev. F MDS 1710A/C and MDS 2710A/C/D 31
• An efficient and properly aligned antenna system with a good
received signal strength (at least –90 dBm). It is possible for a
system to operate with weaker signals, but reliability will be
degraded.
• Proper programming of the transceiver’s operating parameters
(see
Section 5.0, TRANSCEIVER PROGRAMMING).
• The correct interface between the transceiver and the connected
data equipment (correct cable wiring, proper data format, timing,
etc.)
6.1 LED Indicators
The LED status indicators are an important troubleshooting tool and
should be checked whenever a problem is suspected. Table 5 on page 16
describes the function of each status LED.
6.2 Event Codes
When an alarm condition exists, the transceiver creates a code that can
be read on an HHT connected to the DIAG. port. These codes can be very
helpful in resolving many system difficulties. Refer to
Table 8 for a def-
inition of the event codes.
Checking for Alarms—STAT command
To check for alarms, enter STAT on the HHT. If no alarms exist, the mes-
sage NO ALARMS PRESENT appears at the top of the display (
Figure 11).
Invisible place holder
Figure 11. HHT Display in Response to STAT Command
If an alarm does exist, a two-digit alarm code (00–31) is displayed and
the event is identified as a Major or Minor Alarm. A brief description of
the alarm is also given.
If more than one alarm exists, the word MORE appears at the bottom of
the screen. To view additional alarms, press .
ENTER